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Research Papers: Other (Seals, Manufacturing)

Ultrasonic Measurement of Cylindrical Roller Bearing Lubrication Using High Pulse Repletion Rates

[+] Author and Article Information
Meng Li

School of Mechanical Engineering,
State Key Laboratory for Strength
and Vibration of Mechanical Structures;
Key Laboratory of Education Ministry
for Modern Design and Rotor-Bearing System,
Xi'an Jiaotong University,
No. 28, Xianning West Road,
Xi'an, Shaanxi 710049, China
e-mail: meng.li@stu.xjtu.edu.cn

Heng Liu

School of Mechanical Engineering,
State Key Laboratory for Strength
and Vibration of Mechanical Structures;
Key Laboratory of Education Ministry
for Modern Design and Rotor-Bearing System,
Xi'an Jiaotong University,
No. 28, Xianning West Road,
Xi'an, Shaanxi 710049, China
e-mail: hengliu@mail.xjtu.edu.cn

Cong Xu

School of Mechanical Engineering,
State Key Laboratory for Strength
and Vibration of Mechanical Structures,
Xi'an Jiaotong University,
No. 28, Xianning West Road,
Xi'an, Shaanxi 710049, China
e-mail: sdzbxucong@163.com

Minqing Jing

School of Mechanical Engineering,
State Key Laboratory for Strength
and Vibration of Mechanical Structures;
Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,
Xi'an Jiaotong University,
No. 28, Xianning West Road,
Xi'an, Shaanxi 710049, China
e-mail: mjing@mail.xjtu.edu.cn

Wenhui Xin

School of Mechanical
and Precision Instrument Engineering,
Xi'an University of Technology,
No. 5 South Jinhua Road,
Xi'an, Shaanxi 710048, China
e-mail: xinwenhui@xaut.edu.cn

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received December 11, 2014; final manuscript received May 7, 2015; published online July 1, 2015. Assoc. Editor: Xiaolan Ai.

J. Tribol 137(4), 042202 (Oct 01, 2015) (8 pages) Paper No: TRIB-14-1306; doi: 10.1115/1.4030630 History: Received December 11, 2014; Revised May 07, 2015; Online July 01, 2015

This paper describes a measurement of lubricant-film thickness in a roller bearing using a new ultrasonic pulser-receiver, which has a maximum pulse repetition rate (PRR) of 100 kHz. The experimental results show that a higher PRR can help to get more measurement points and more details of the oil-film thickness distribution. Furthermore, the influence of rotor vibration response for the oil-film thickness is discussed, which is in keeping with the simulation result. Finally, the limits of the PRR are discussed in detail and the effect of the transducer focal zone size is also observed.

Copyright © 2015 by ASME
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References

Figures

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Fig. 1

Schematic diagram of the experimental apparatus

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Fig. 2

Photograph of the experimental apparatus and ultrasonic measurement system

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Fig. 3

Photograph of the ultrasonic pulser-receiver

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Fig. 4

Schematic diagram of the ultrasonic pulser-receiver

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Fig. 5

Measured reflection coefficients for various PRRs

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Fig. 6

Comparison of theoretical and experimental results with variation in PRR

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Fig. 7

Comparison of theoretical and experimental results with variation in load

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Fig. 8

Comparison of theoretical and experimental results with variation in speed

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Fig. 9

Repetition of the reflection coefficient record about the same roller

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Fig. 10

Comparison of theoretical and experimental minimum film thickness for each time

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Fig. 11

Repeated measurement results under two conditions

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Fig. 12

Radial displacement of a roller

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Fig. 13

Radial displacement of the same roller under two conditions

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Fig. 14

Schematic diagram of the instrumented roller bearing

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Fig. 15

Complete reflected waveform from the roller bearing

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Fig. 16

Schematic diagram of the receiving area of the transducer

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